Ce-Doped TiO 2 Fabricated Glassy Carbon Electrode for Efficient Hydrogen Evolution Reaction in Acidic Medium

• Published in: Chemistry, an Asian journal Vol. 19; no. 16; p. e202301143
• Main Authors: Islam, Md Nurnobi, Hossain, Md Mosaraf, Maktedar, Shrikant S, Rahaman, Mostafizur, Rahman, Mohammad Atiqur, Aldalbahi, Ali, Hasnat, Mohammad A
• Format: Journal Article
• Language: English
• Published: Germany 19.08.2024
• Subjects: Faradaic efficiency; Hydrogen evolution reaction (HER); Turnover frequency; Overpotential; Ce-doped TiO2; Tafel slope
• ISSN: 1861-471X
• DOI: 10.1002/asia.202301143

The quest for sustainable and clean energy sources has intensified research on the Hydrogen Evolution Reaction (HER) in recent decades. In this study, we have presented a novel Ce-doped TiO catalyst synthesized through the sol-gel method, showcasing its potential as a superior electrocatalyst for HER in an acidic medium. Comprehensive characterization through X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Energy dispersive X-ray (EDX), and Raman spectroscopy confirms the successful formation of the catalyst. Electrocatalytic performance evaluation, including open circuit potential (OCP), electrochemical impedance spectroscopy (EIS), and Tafel analysis, demonstrates that GCE-5wt.%CeTiO outperforms bare GCE, as well as Ce and TiO -based electrodes. Kinetic investigations reveal a Tafel slope of 105 mV dec , indicating the Volmer step as the rate-determining step. The onset potential for HER at GCE-5wt.%CeTiO is -0.16 V vs. RHE, close to the platinum electrode. Notably, the catalyst exhibits a low overpotential of 401 mV to achieve a current density of 10 mA cm with an impressive 95 % Faradaic efficiency. Furthermore, the catalyst demonstrates outstanding durability, maintaining a negligible increase in overpotential during a 14-hour chronoamperometry test. These results have far-reaching implications for the development of cost-effective and efficient electrocatalysts for hydrogen production.